Yukawa-coupling corrections to scalar quark decays

Abstract

Heavy squark decays into top and charginos or neutralinos could be an unexpected source of top quarks at hadron colliders. A detailed treatment of these processes is necessary for a reliable calculation of both the top quark production cross-section and the standard top quark branching ratio in the MSSM. Along this line we compute the electroweak corrections to the sbottom decays sbottom_a --> chargino_i top within the Yukawa coupling approximation. The calculation of these higher order contributions requires renormalization of both the bottom squark mixing angle and of tan(beta). This type of corrections gives the leading order electroweak effects at low and high tan(beta).

16 pages, LaTeX, 5 figures included using epsfig. Comments added, equation 25 corrected, labels of fig.2 corrected, references updated

References in corpus (2)

• Implications on the Supersymmetric Higgs sector from Top quark decays at the Tevatron
• Heavy charged Higgs boson decaying into top quark in the MSSM

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